McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    57 Products

    Rounded Machine Keys

    Image of Product. Front orientation. Machine Keys. Rounded Machine Keys.
    When installed, these keys fill oval keyways completely, reducing stress on the key and shaft. Using them in a closed keyway keeps them from sliding along the shaft axis. The rounded ends make it easy to slide gears, hubs, and other components into place. These are also known as feather keys. Machine keys are often the same material as the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
    1008-1045 Carbon Steel—Steel keys are strong and easy to machine. Since steel is the most common material, these keys work in many applications. Steel keys rust when exposed to moisture, so they should only be used in dry environments.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized keys are the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use them when parts need to be taken apart frequently, such as for maintenance or prototyping. Undersized metric keys meet DIN 6885 dimensional standards.
    Tolerance,
    mm
    Lg.,
    mm
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    1008-1045 Carbon Steel
     
    9 mm × 14 mm
    30Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A59600000
    35Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6030000
    36Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6040000
    40Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A9500000
    45Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A9570000
    50Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A9600000
    56Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A9760000
    60Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A9890000
    63Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6070000
    65Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6200000
    70Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6280000
    80Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6310000
    90Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6610000
    100Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6620000
    110Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6640000
    120Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6810000
    125Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885196717A6880000
     

    Machine Keys

    Image of Product. Front orientation. Machine Keys. Machine Keys.
    Straight keys, with a square or rectangular cross section, are the most common type of key. Install them in keyways to transmit torque from shafts to gears and other components. Machine keys are often the same material as the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
    1008-1045 Carbon Steel—Steel keys are strong and easy to machine. Since steel is the most common material, these keys work in many applications. Steel keys rust when exposed to moisture, so they should only be used in dry environments.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized keys are the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use them when parts need to be taken apart frequently, such as for maintenance or prototyping.
    Tolerance,
    mm
    Lg.,
    mm
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Pkg.
    Qty.
    Pkg.
    1008-1045 Carbon Steel
     
    9 mm × 14 mm
    30Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A822000000
    35Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A82300000
    36Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A82400000
    40Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A82500000
    45Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A82600000
    50Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A82700000
    56Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A82800000
    60Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A82900000
    70Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A83300000
    80Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885598870A83400000
    90Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885198870A8350000
    120Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885198870A8380000
    125Undersized-0.090 to 0.000-0.043 to 0.000Not RatedDIN 6885198870A8390000
     

    Machine Key Stock

    Cut this square or rectangular key stock to length to create a straight machine key. Straight keys are the most common type of key. Machine keys are often the same material as the shaft and other components with which they are used. To use a key as a sacrificial part, choose a softer key that will shear off when parts are exposed to excessive force, preventing damage to expensive equipment.
    1008-1045 Carbon Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    1008-1045 carbon steel key stock is an economical choice with good strength.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    6 mm × 14 mmUndersized-0.075 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A52300000
    9 mm × 14 mmOversized0.000 to 0.0760.000 to 0.076Rockwell B87—92288A33400000
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A7600000
    14 mm × 14 mmOversized0.000 to 0.0760.000 to 0.076Rockwell B87—92288A32100000
    14 mm × 14 mmUndersized-0.043 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A53200000
     
    1,000 mm Long
    6 mm × 14 mmUndersized-0.075 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A55800000
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A57300000
    14 mm × 14 mmUndersized-0.043 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A57900000
     
    Zinc-Plated 1008-1045 Carbon Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    Zinc-plated 1008-1045 carbon steel key stock is an economical choice with good strength and resists corrosion in wet environments.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Each
    305 mm Long
    6 mm × 14 mmOversized0.000 to 0.0760.000 to 0.076Rockwell B8792288A152000000
    9 mm × 14 mmOversized0.000 to 0.0760.000 to 0.076Rockwell B8792288A25500000
    14 mm × 14 mmOversized0.000 to 0.0760.000 to 0.076Rockwell B8792288A35000000
     
    Zinc-Yellow-Chromate-Plated 1045 Carbon Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    Zinc-yellow-chromate-plated 1045 carbon steel key stock is an economical choice with good strength and resists corrosion in wet environments.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A711000000
    14 mm × 14 mmUndersized-0.043 to 0.000-0.043 to 0.000Rockwell B87DIN 688092288A70700000
     
    4140 Alloy Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    4140 alloy steel key stock is an economical choice with good strength. 4140 alloy steel key stock has greater strength and toughness after hardening than carbon steel, making it useful for high-stress applications.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B90DIN 688092288A663000000
     
    1,000 mm Long
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B90DIN 688092288A674000000
     
    18-8 Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    18-8 stainless steel key stock offers a balance of strength and corrosion resistance. It may be mildly magnetic. 18-8 stainless steel key stock is more corrosion resistant than steel key stock.
    Oversized Tolerance—Slightly larger than the size listed in the table, oversized stock fits tightly in a keyway. Press it into place for use in high-torque applications or to replace a key in a worn keyway.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    9 mm × 14 mmOversized0.000 to 0.0760.000 to 0.076Rockwell B82DIN 17498810A160000000
    14 mm × 14 mmOversized0.000 to 0.0760.000 to 0.076Rockwell B82DIN 17898810A20000000
     
    304 Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    304 stainless steel key stock offers a good balance of strength, corrosion resistance, and machinability. 304 stainless steel key stock is more corrosion resistant than steel key stock.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B80DIN 688092288A607000000
     
    1,000 mm Long
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B80DIN 688092288A613000000
     
    316 Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    316 stainless steel key stock has the best corrosion resistance of our stainless steel key stock and may be mildly magnetic. 316 stainless steel key stock is more corrosion resistant than steel key stock.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    1,000 mm Long
    9 mm × 14 mmUndersized-0.090 to 0.000-0.043 to 0.000Rockwell B85DIN 688092288A6460000000
    14 mm × 14 mmUndersized-0.043 to 0.000-0.043 to 0.000Rockwell B85DIN 688092288A653000000
     
    316/316L Stainless Steel
    Image of Product. Front orientation. Machine Key Stock. Machine Key Stock.
    316/316L stainless steel key stock has the best corrosion resistance of our stainless steel key stock and may be mildly magnetic. 316/316L stainless steel key stock is more corrosion resistant than steel key stock.
    Undersized Tolerance—Slightly smaller than the size listed in the table, undersized stock is the choice when you need a slightly looser fit or when you have an inconsistent keyway. Use it when parts need to be taken apart frequently, such as for maintenance or prototyping.
    DIN 6880—Key stock that meets DIN 6880 conforms to DIN standards for undersized keys.
    Tolerance,
    mm
    Ht. × Wd.
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Specs.
    Met
    Each
    305 mm Long
    9 mm × 14 mmUndersized-0.090 to 0.000-0.036 to 0.000Rockwell B86DIN 688090457A166000000
    14 mm × 14 mmUndersized-0.043 to 0.000-0.043 to 0.000Rockwell B86DIN 688090457A19000000
     

    Tapped Rounded Machine Keys

    Image of Product. Front orientation. Machine Keys. Tapped Rounded Machine Keys.
    Thread a screw through the tapped hole to pop these keys out of a keyway. When installed, they fill oval keyways completely, reducing stress on the key and shaft. Using them in a closed keyway keeps them from sliding along the shaft axis. The rounded ends make it easy to slide gears, hubs, and other components into place. To install, press them in to place. Use them for permanent or high-torque applications, or to replace a key in a worn keyway. Keys are made of steel.
    Undersized Tolerance—Undersized keys are good when you need a slightly looser fit or when you have an inconsistent keyway. Use them with parts you take apart frequently, such as for maintenance or prototyping. They meet DIN 6885 dimensional standards for undersized keys.
    Tolerance,
    mm
    Lg.,
    mm
    Tolerance
    Rating
    Ht.
    Wd.
    Min.
    Hardness
    Thread
    Size
    Specs.
    Met
    Each
    1018-1045 Carbon Steel
     
    9 mm × 14 mm
    30Undersized-0.090 to 0.000-0.043 to 0.000Not RatedM5 × 0.8 mmDIN 688590164A15900000
    36Undersized-0.090 to 0.000-0.043 to 0.000Not RatedM5 × 0.8 mmDIN 688590164A1620000
    50Undersized-0.090 to 0.000-0.043 to 0.000Not RatedM5 × 0.8 mmDIN 688590164A16500000
     

    Fixture Keys

    Image of ProductInUse. Front orientation. Contains Annotated. Fixture Keys. Fixture Keys.
    Image of Product. Front orientation. Contains Annotated. Fixture Keys. Fixture Keys, Rectangle.

    Rectangle

    Sized to fit with precision in machine table T-slots, use these keys to locate fixtures and vises on your machine table. They mount to the underside of your fixture or vise with a socket head cap screw.
    For Machine Table
    T-Slot Wd., mm
    Lg.,
    mm
    Wd.,
    mm
    Ht.,
    mm
    Wd. Tolerance,
    mm
    For Mounting
    Screw Size
    Mounting Fasteners
    Included
    Each
    Rectangle
     
    Steel
    14221410-0.011 to 0M6
    		No8961A73000000
     
    back to top